REMOTE HEART RATE MONITORING BASED ON IMAGING FOR MOVING SUBJECTS

摘要

Systems and methods are disclosed to measure a PPG signal. In some embodiments, a method may include capturing a plurality of frames of a subject; tracking the position of a region of interest of the subject in each of the plurality of frames; creating a first time series signal, a second time series signal, and third time series signal corresponding with respective color channels of the plurality of frames; normalizing the first, second, and third time series signals, combining the normalized first time series signal, the normalized first time series signal, and the normalized first time series signal into a combined signal; creating a spectral signal from the combined signal; and extracting the PPG signal from the spectral signal.

主权项

1. A method for measuring a PPG signal, the method comprising:
capturing a plurality of frames of a subject with a color image sensor, wherein each of the plurality of frames includes a first color channel value, a second color channel value, and a third color channel value for each pixel in the plurality of frames; tracking the position of a region of interest of the subject in each of the plurality of frames; creating a first time series signal corresponding with the first color channel of the plurality of frames; creating a second time series signal corresponding with the second color channel of the plurality of frames; creating a third time series signal corresponding with the third color channel of the plurality of frames; normalizing the first time series signal in space to create a normalized first time series signal; normalizing the second time series signal in space to create a normalized second time series signal; normalizing the third time series signal in space to create a normalized third time series signal; correcting for specular reflection in the first time series signal the normalized first time series signal and the normalized first time series signal by combining the normalized first time series signal, the normalized first time series signal, and the normalized first time series signal into a combined signal; creating a spectral signal from the combined signal; and extracting the PPG signal from the spectral signal.